40310561 has 2 divisors, whose sum is σ = 40310562. Its totient is φ = 40310560.

The previous prime is 40310549. The next prime is 40310563. The reversal of 40310561 is 16501304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32993536 + 7317025 = 5744^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 40310561 - 2⁶ = 40310497 is a prime.

Together with 40310563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40310563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20155280 + 20155281.

It is an arithmetic number, because the mean of its divisors is an integer number (20155281).

Almost surely, 2^40310561 is an apocalyptic number.

It is an amenable number.

40310561 is a deficient number, since it is larger than the sum of its proper divisors (1).

40310561 is an equidigital number, since it uses as much as digits as its factorization.

40310561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 40310561 is about 6349.0598516631. The cubic root of 40310561 is about 342.8779949537.

Adding to 40310561 its reverse (16501304), we get a palindrome (56811865).

The spelling of 40310561 in words is "forty million, three hundred ten thousand, five hundred sixty-one".